Percival P. Cassidy wrote:
No one uses their real name, address, or phone number on those
loyalty cards.

Both OfficeMax and our regional supermarket chain have my real name
and address and phone number, and I keep getting discount coupons in
the mail: $10 off next purchase at the supermarket, and (most
recently) $25 off a $75 purchase at OfficeMax.

I get the same offers, and I never gave them my name or info.